"Bring the accused forward!" a voice booms across the hall.
A lone pokemon stands tall and walks forward down a long and crystalline hallway. Mewtwo, called the accused, takes notice of his surroundings for the first time. I have been around the world in my travels, he thinks to himself, but I have never seen a place like this. Indeed, there have been only a few beings that have ever been inside the sacred space of the Hall of Origin. The floor is made of crystal tiles that seem to shine with pure and golden light, filling those who see it with a sense of awe. Lining the hall itself are tall pillars made from white marble so pristine that they seem to have been carved from the light of a star. Standing among the pillars, Mewtwo sees the forms of the rest of the legendary pokemon. Some he knows personally while others he has only heard of through myth. Others still, he has only seen in his dreams.
Mewtwo looks at all the legends that stand around him. Some look at him with fear, not of his destructive power, but for his safety. Others look at him with hate in their eyes. They are the reason I am here, Mewtwo realizes. Their stares tell him that he does not belong here. They wish him to be gone. Mewtwo's eyes never stay on a single pokemon for more than an instant. He continues down the hallway, ready to face the master of the Hall. However, right before he reaches the end, he sees one more pokemon. Her face is so familiar to him because he was made from her. Mew¸ he almost says aloud and momentarily stops walking.
Mew, ancestor to all mortal pokemon and mother to Mewtwo himself, floats telekinetically near the end of the hall, right before the crystal stairs that lead up to where the Creator stands. She looks at her son with tears building in her eyes.
Mewtwo, she speaks with her telepathy, I'm so scared.
It will be alright, he responds with his own power. In this world without the people that made him, Mewtwo's only remaining family is Mew. They look at each other for a few more seconds, then Mewtwo keeps walking until he reaches the foot of the stairs. He does not set foot upon this staircase as no one other than the Creator is allowed to walk upon them. Mewtwo looks up at the seemingly infinite staircase, staring into the eyes of the world's shaper. Using his telepathic power, Mewtwo communicates with everyone in the Hall of Origin.
"I am here!" Mewtwo's voice fills the hall. "Tell me why I am here and what I am accused of!"
A light pours forth from the top of the staircase and the silhouette of the Creator, Arceus, is seen standing above all of creation.
"Mewtwo," Arceus speaks with its powerful voice, "you have been accused of harboring the will of humanity within your heart. This goes against our laws as the will of humanity brings great harm upon our world. Humanity was a plague on the world that I created and I will not allow any creature to bring back that plague."
Mewtwo knows why he is here. Many years ago, humanity ruled over the world of pokemon. They captured pokemon and made them battle one another, and put them to work while the humans themselves sat back and watched in order to entertain themselves. After a while, the legendary pokemon, called the Ageless, finally acted in order to put an end to humanity's conquest of the pokemon world.
The war was great and terrible, each side fighting with bullets and bombs and with claws and fangs, until one day the war ended in the complete genocide of the human race. Even with all of its technology, humanity could not defeat the Ageless pokemon. Everything that was even remotely human was destroyed after the war. Entire cities were burned down and manmade structures were reduced to rubble. Even pokemon that were created due to the effects of humanity were wiped out. Pokemon like Voltorb and Magnemite, modeled after human technology, and Grimer and Trubbish, born from human pollution, were totally destroyed. As a result of this genocide, Mewtwo now stands as the final remnant of humanity before the Ageless pokemon in the Hall of Origin. The only reason that he is still alive is because a part of him is still Ageless as he was created from the genetic code of Mew.
"You have heard of your crime, Mewtwo." Arceus continues. "What have you to say in your defense?"
"I may have been created due to humanity's science, but my heart and my will are my own. The circumstances of my birth do not influence my behavior."
The hallway erupts with angry screams and roars from various Ageless pokemon. They shout for Mewtwo's execution, while others plead for his freedom. Opinion over Mewtwo's fate is divided.
"My role in this universe is to create," Arceus addresses the Hall, "but I will not hesitate to destroy if it is deemed necessary. However, I will not make this decision alone. Ageless pokemon that stand before me, hear my words! You will make the decision regarding Mewtwo's future!"
Arceus then directs its words back to Mewtwo, "Mewtwo, while the Ageless pokemon deliberate, you will wait in the World in Between."
Mewtwo suddenly feels his body fading away as he is transported to another place. Before he leaves, he looks back one last time at the face of his mother. She has already made her choice and smiles sadly as her son fades into nothingness.